tye/samples/dapr/pub-sub/store/Startup.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.Json;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Components;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.HttpsPolicy;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;

namespace store
{
    public class Startup
    {
        private readonly JsonSerializerOptions options = new JsonSerializerOptions()
        {
            PropertyNameCaseInsensitive = true,
            PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
        };
        
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }

        public void ConfigureServices(IServiceCollection services)
        {
            services.AddRazorPages();
            services.AddServerSideBlazor();
            services.AddDaprClient(client =>
            {
                client.UseJsonSerializationOptions(options);
            });

            services.AddSingleton<OrdersEventBroker>();
        }

        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }

            app.UseStaticFiles();

            app.UseRouting();

            app.UseCloudEvents();

            app.UseEndpoints(endpoints =>
            {
                endpoints.MapBlazorHub();
                endpoints.MapFallbackToPage("/_Host");

                endpoints.MapSubscribeHandler();

                var broker = endpoints.ServiceProvider.GetRequiredService<OrdersEventBroker>();
                endpoints.MapPost("/orderprocessed", async context =>
                {
                    var confirmation = await JsonSerializer.DeserializeAsync<OrderConfirmation>(context.Request.Body, new JsonSerializerOptions()
                    {
                        PropertyNameCaseInsensitive = true
                    });
                    broker.Complete(confirmation);
                }).WithTopic("messagebus", "orderprocessed");
            });
        }
    }
}